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Silicon carbide devices are attractive in drives because they

  • A.switch faster and tolerate higher temperature
  • B.cost less than the equivalent silicon devices
  • C.require no gate drive circuit at all
  • D.conduct in both directions without a body diode

Answer: A

Lower switching loss allows higher frequencies and smaller filters, and the higher junction temperature eases the cooling. The cost premium is what has confined them so far to applications where size or efficiency justifies it.

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